Catalyst with Cu being loaded for taking off waste gas containing HCN and its preparing method as well as application

Abstract

A carried Cu catalyst for removing the HCN contained waste gas contains Cu and Al2O3 in Wt ratio of (2.96-5.92):100. Its preparing process includes adding Cu(NO3)2 solution to Al2O3 carrier, immersing, drying, calcining and H2 reducing. Its application method includes loading said catalyst into reaction furnace, heating to 150-300 deg.C, introducing the mixed gas containing HCN, NH3, tar and air to said reaction furnace, and catalytic combustion. Its advantages are simple operation etc.

Description

Technical field:

[0001] The invention belongs to a kind of method of removing HCN, specifically relates to a kind of using Cu-Al 2 O 3 A method for removing HCN-containing waste gas produced in the production process of carbon fiber by catalytic oxidation as a catalyst. Background technique:

[0002] In the production process of polyacrylonitrile-based carbon fiber, the highly toxic gas HCN and harmful gas NH are inevitably generated 3 and tar and other waste gases, if they are directly discharged without treatment, it will inevitably cause serious environmental pollution, and even endanger the survival of animals and plants, especially the minimum lethal dose of HCN to humans is 1mg / kg body weight, which makes people exposed to 20ppm HCN in the air Poisoning within a few hours. Therefore, the study of HCN removal is of great significance for the development of carbon fiber industry and the protection of the ecological environment.

[0003] At present, there are four mai...